anonymous
  • anonymous
need help with system: -14=-2=y-7x 2x=10y +4 PLEASE HELP!!!!
Mathematics
chestercat
  • chestercat
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anonymous
  • anonymous
What do you need to do with the system?
anonymous
  • anonymous
solve for x and y
anonymous
  • anonymous
Is the system\[\begin{matrix}-14 - 2 = y-7x \\ 2x = 10y + 4\end{matrix}\]

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anonymous
  • anonymous
Do you have to use any particular method?
anonymous
  • anonymous
sorry.... it is: -14=-20y-7x 10y +4 = 2x
anonymous
  • anonymous
solve by elimination....
anonymous
  • anonymous
(sigh...)
anonymous
  • anonymous
Weird. I replied to this but my answer isn't showing up. Let me re-type it real fast.
anonymous
  • anonymous
'k
anonymous
  • anonymous
First, we need to solve the first equation for x. We get\[x = -(20/7)y + 2\] Then we substitute this expression into the second equation. This yields \[10y - 2(-(20/7)y + 2) = -4\]Solve this for y and plug the value of y back into our expression for x. Let me know what you get.
anonymous
  • anonymous
x=34 y=?

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